Testosterone cypionate

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Testosterone cypionate, sold under the brand name Depo-Testosterone among others, is an androgen and anabolic steroid (AAS) medication which is used mainly in the treatment of low testosterone levels in men, including hormone therapy for transgender men. It is given by injection into muscle once every one to four weeks or subcutaneously as smaller doses several times per week depending on clinical indication. Side effects of testosterone cypionate include symptoms of masculinization like acne, increased hair growth, voice changes, and increased sexual desire. Testosterone supplementation is also known to reduce the threshold for aggressive behavior in men. The drug is a synthetic androgen and anabolic steroid and hence is an agonist of the androgen receptor (AR), the biological target of androgens like testosterone and dihydrotestosterone (DHT). Testosterone cypionate is converted by the body to testosterone that has both androgenic effects and anabolic effects, which make it useful for producing masculinization and suitable for androgen replacement therapy; still, the relative potency of these effects can depend on various factors and is a topic of ongoing research. Testosterone can either directly exert effects on target tissues or be metabolized by 5α-reductase into DHT or aromatized to estradiol (E2). Both testosterone and DHT bind to an androgen receptor(AR); however, DHT has a stronger binding affinity than testosterone and may have more androgenic effect in certain tissues at lower levels. Testosterone cypionate is a testosterone ester and a long-lasting prodrug of testosterone in the body. Because of this, it is considered to be a natural and bioidentical form of testosterone. Testosterone cypionate was introduced for medical use in 1951. Along with testosterone enanthate, testosterone undecanoate, and testosterone propionate, it is one of the most commonly used testosterone esters. It is used mainly in the United States. In addition to its medical use, testosterone cypionate...